JP7120566B2 - fabric - Google Patents

Description

The present invention relates to textiles. More particularly, the present invention relates to fabrics that exhibit excellent breathability and impermeability.

Conventionally, in the field of uniforms, blouses, shirts, sports clothes, etc., clothes are required not only to be breathable but also to be impermeable so that the skin cannot be seen through when worn. However, breathability and impermeability are generally conflicting properties. For example, if the weaving density of the fabric is lowered to obtain air permeability, the fabric will have gaps between adjacent yarns, and the skin will be seen through these gaps, making it impossible to obtain sufficient impermeability. On the other hand, if the weaving density of the fabric is increased in order to obtain impermeability, the fabric will be hindered from passing air, and the air permeability will decrease.

Therefore, for example, Patent Document 1 proposes a fiber structure in which a matting agent is sufficiently kneaded into the fiber so that the matting agent scatters the light rays passing through the fiber itself, thereby improving the impermeability. ing. Further, Patent Document 2 proposes a woven fabric having a two-layer structure.

JP-A-5-148734 JP-A-10-273881

However, the fiber structure described in Patent Literature 1 cannot avoid the transmission of light from between the threads. Therefore, the fiber structure needs to have a higher weaving density, resulting in lower air permeability. In addition, the fabric of Patent Document 2 is intended to improve antistatic properties and sweat absorption by attaching a water-absorbing polymer, and the anti-transparency and breathability are not sufficiently improved. .

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a woven fabric having both excellent breathability and impermeability.

The textile product of the present invention that solves the above problems mainly includes the following configurations.

(1) A woven fabric having a multiple weave structure and a single weave structure, an air permeability of 100 (cc/cm ² /sec) or more, and an imperviousness of 85% or more as represented by the following formula (1): .
Impermeability (%) = 100 - [100 x (L ^* value when a whiteboard is installed on the back side of the sample - L ^* value when a blackboard is installed on the back side of the sample) / (L ^* value of whiteboard - blackboard L ^* value of)] ... (1)

According to such a configuration, the resulting woven fabric can have both excellent air permeability and impermeability.

(2) The woven fabric according to (1), wherein the multi-ply weave is a plain triple weave, and the single-ply weave is a 6-mesh weave.

According to such a configuration, the resulting woven fabric can achieve both superior breathability and impermeability. Also, the woven fabric has an excellent appearance.

(3) The woven fabric according to (1) or (2), wherein at least one of the warp and weft has a twist number of 300 to 2000 t/m.

According to such a configuration, the resulting woven fabric can achieve both superior breathability and impermeability.

(4) The woven fabric according to any one of (1) to (3), wherein at least one of the warp and weft has a total fineness of 56 to 330 dtex.

According to such a configuration, the resulting woven fabric can achieve both superior breathability and impermeability. In addition, the woven fabric has an excellent texture.

(5) The woven fabric according to any one of (1) to (4), which has a cover factor of 1950 to 3100.

According to such a configuration, the resulting woven fabric has the advantage of being compatible with air permeability, impermeability, and fabric physical properties.

(6) The woven fabric according to any one of (1) to (5), wherein at least one of the warp and weft is mixed with a matting agent.

With such a configuration, the obtained woven fabric can exhibit more excellent impermeability.

(7) The woven fabric according to any one of (1) to (6), wherein the ratio of the multiple weave structure and the single weave structure is 25:75 to 75:25.

According to such a configuration, the resulting woven fabric can achieve both superior breathability and impermeability. Also, the woven fabric has an excellent appearance.

According to the present invention, it is possible to provide a woven fabric having both excellent breathability and impermeability.

FIG. 1 is a weave pattern diagram of a woven fabric according to one embodiment of the present invention. FIG. 2 is another weave pattern diagram of the fabric of one embodiment of the present invention. FIG. 3 is another weave pattern diagram of the fabric of one embodiment of the present invention. FIG. 4 is another weave pattern diagram of the fabric of one embodiment of the present invention. FIG. 5 is another weave pattern diagram of the fabric of one embodiment of the present invention. FIG. 6 is another weave pattern diagram of the fabric of one embodiment of the present invention. FIG. 7 is another weave pattern diagram of the fabric of one embodiment of the present invention. FIG. 8 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 9 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 10 is a weave pattern diagram of the fabric of one embodiment of the present invention. FIG. 11 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 12 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 13 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 14 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 15 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 16 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 17 is another fabric weave diagram of the fabric of one embodiment of the present invention. FIG. 18 is another fabric weave diagram of the fabric of one embodiment of the present invention. 19 is a weave structure diagram of the woven fabric of Comparative Example 1. FIG.

<Textiles>
The fabric of one embodiment of the present invention has a multiple weave system and a single weave system. The woven fabric has an air permeability of 100 (cc/cm ² /sec) or more and an impermeability of 85% or more, which is represented by the following formula (1). Each of these will be described below.
Impermeability (%) = 100 - [100 x (L ^* value when a whiteboard is installed on the back side of the sample - L ^* value when a blackboard is installed on the back side of the sample) / (L ^* value of whiteboard - blackboard L ^* value of)] ... (1)

The multiple weave structure is not particularly limited as long as it is a weave structure of double weave or more. For example, the multi-weave structure is a double weave structure, a triple weave structure, and a quadruple weave structure. The multiple weave structure may be plain weave, twill weave, mesh weave, pebble weave, or any of these modified structures. Among these, the multiple weave structure is easy to combine with a single weave structure (especially a mesh weave or a plain single weave structure) described later, and is easy to improve the permeability of the resulting fabric. A triple weave is preferred, a triple weave is more preferred, and a plain triple weave is even more preferred.

The single weave structure may be plain weave, twill weave, mesh weave, stone weave, or any of these modified structures. Among these, the single weave structure is preferably a plain weave, a twill weave, or a mesh weave because it is easy to combine with the multiple weave structure described above and the breathability of the resulting fabric is easily improved, and the mesh weave is preferred. is more preferable. The type of twill weave is not particularly limited. By way of example, the twill weave may be 2/1 twill, 2/2 twill, 3/1 twill, and the like.

When the single weave structure is a plain weave or a mesh weave, the number of warp yarns constituting the weave structure is preferably 2 or more, more preferably 4 or more, and preferably 6. More preferred. Also, the number of warps (number of sheets) is preferably 12 or less. When the single-ply weave structure is a 6-ply mesh structure and the multiple-ply structure is a plain triple-ply weave, the obtained woven fabric can have particularly excellent air permeability and impermeability, and also has an excellent appearance.

Returning to the description of the overall weave structure, the warp and weft yarns that form the multiple weave structure and the single weave structure that constitute the fabric of the present embodiment are not particularly limited. By way of example, the warp and weft yarns may consist of filament yarns, spun yarns. Filament yarns include various twisted yarns (for example, false twisted fusion yarns described later) and drawn yarns. Spun yarn includes various synthetic fibers and natural fibers (such as cotton).

Materials for the warp and weft are not particularly limited. For example, warp and weft materials are various synthetic fibers, semi-synthetic fibers, regenerated fibers, and the like. More specifically, the warp and weft materials are polyester, nylon, polyester-cotton blended yarn, cotton, acetate, rayon, cupra, and the like. Among these, when a woven fabric is used for clothing, the material is preferably polyester or nylon, more preferably polyester, from the viewpoint of texture and the like. Polyester fibers include polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate and the like. Polyethylene terephthalate and polybutylene terephthalate may be copolymer polyesters obtained by copolymerizing aliphatic dicarboxylic acids such as isophthalic acid, 5-sodiumsulfoisophthalic acid and adipic acid as acid components. The nylon fibers may be nylon 6, nylon 66, nylon 12, and the like.

In addition, matting agents, heat stabilizers, antioxidants, light stabilizers, smoothing agents, antistatic agents, and plasticizers are added to the warp and weft to improve productivity and properties in the spinning and processing processes. , thickeners, pigments, and flame retardants. Among these, it is preferable that at least one of the warp and the weft of the woven fabric of the present embodiment is mixed with a matting agent.

The matting agent is not particularly limited. Examples of matting agents include titanium oxide, calcium carbonate, silica, zirconium oxide, magnesium oxide, antimony oxide, zinc oxide, lead tungstate, calcium tungstate, calcium carbonate, and the like. When a matting agent is mixed, the content of the matting agent is not particularly limited. For example, the content of the matting agent in the fiber is preferably 0.1% by mass or more, more preferably 1.0% by mass or more. Also, the content of the matting agent is preferably 20% by mass or less, more preferably 15% by mass or less, in the fiber. By mixing the matting agent within the above range, the obtained woven fabric scatters the light rays passing through the fibers, thereby improving the anti-transparency.

At least one of the total fineness of warp and weft is preferably 56 dtex or more, more preferably 84 dtex or more. At least one of the total fineness of warp and weft is preferably 330 dtex or less, more preferably 220 dtex or less. When the total fineness is within the above range, the resulting woven fabric is suitable for use in clothing and the like in terms of texture, basis weight, thickness and the like. In addition, the resulting woven fabric can have both better air permeability and impermeability. The total fineness can be calculated according to JIS L 1013 (1999) 8.3.1 Regular fineness b) Method B. Specifically, the mass of a sample sampled by applying an initial load of 0.882 mN / dtex is measured when absolutely dried, and the value is multiplied by the official moisture content specified in JIS L 0105 3.1. (Process moisture content was 4.5% for polyamide and 0% for polypropylene).

The single fiber fineness of either the warp or the weft is preferably 0.5 dtex or more, more preferably 1.16 dtex or more. Further, the single fiber fineness is preferably 4.7 dtex or less, more preferably 3.5 dtex or less. When the single fiber fineness is within the above range, the hardness (feel) of the resulting fabric is suitable for clothing and the like, which is preferable. The single fiber fineness can be calculated by dividing the total fineness by the number of filaments. The number of filaments can be calculated based on the method of JIS L 1013 (1999) 8.4.

The cover factor of the woven fabric of the present embodiment is preferably 1950 or more, more preferably 2000 or more. Also, the cover factor is preferably 3100 or less, more preferably 2800 or less. When the cover factor is within the above range, the resulting woven fabric tends to have both excellent air permeability and impermeability. In addition, in this embodiment, the cover factor (CF) is defined by the following formula.
CF = (DW) ^1/2 x MW + (DF) ^1/2 x MF
(where DW is the warp total fineness (dtex), MW is the warp weaving density (line/2.54 cm), DF is the weft total fineness (dtex), and MF is the weft weaving density (line/2.54 cm). 54 cm)

The cross-sectional shape of the single yarns constituting the warp and weft is not particularly limited. For example, the cross-sectional shape of the single yarn may be a round cross-section, various irregular cross-sections, or a hollow fiber. Flat type, triangular type, C type, T type, Y type, dumpling type, hollow type and the like are exemplified as irregular cross sections.

The warp and weft that constitute the fabric of the present embodiment are preferably twisted yarns. Since at least one of the warp yarn and the weft yarn is twisted yarn, the resulting fabric has relatively high rigidity even with a low density, and is less likely to be misaligned. And because these fabrics can be constructed with a lower density, they are more breathable.

The type of twisted yarn is not particularly limited. To give an example, the twisted yarn is preferably a false-twisted fusible yarn, a medium-strong twisted yarn, or the like, from the viewpoint of preventing fabric misalignment. A false twisted yarn is a yarn obtained by untwisting a yarn that has been twisted while applying heat and then twisting the yarn in the opposite direction. In the false-twisted fused yarn, an untwisted portion having a twist fused in the false-twisting direction and an untwisted portion having a twist in the direction opposite to the false-twisting direction are alternately arranged along the yarn direction. Thread. A moderately hard twisted yarn refers to a twisted yarn with a degree of twisting of medium to high strength.

The number of twists of the warp and weft of this embodiment is not particularly limited. The woven fabric of the present embodiment preferably has a twist number of at least one of the warp and the weft of 300 t/m or more, more preferably 600 t/m or more. The twist number of at least one of the warp and weft is preferably 2000 t/m or less, more preferably 1400 t/m or less (t is the number of twists). When the number of twists is within the above range, the resulting woven fabric has appropriate voids due to swelling of the yarn, and air permeability can be improved while securing impermeability.

In particular, the warp constituting the fabric of the present embodiment preferably contains 50% by mass or more of twisted yarn, more preferably 95% by mass or more of twisted yarn, and is entirely composed of twisted yarn. More preferred. On the other hand, the wefts constituting the fabric of the present embodiment preferably contain twisted yarns in an amount of 50% by mass or more, more preferably 70% by mass or more. The weft yarns may include drawn yarns, spun yarns, etc., in addition to twisted yarns. In addition, the weft yarns may include textured yarns subjected to desired processing in order to further enhance the impermeability, heat shielding properties, and the like. Examples of such textured yarns include bright yarns, semi-dull yarns, full-dull yarns, yarns that are not twisted and have little bundling, and yarns with a large fineness. Bright yarn, semi-dull yarn, and full-dull yarn are all processed yarns to which a predetermined amount of inorganic oxide fine particles (eg, titanium oxide) are blended to impart light reflectivity and the like and a matting effect. For example, a bright yarn is a textured yarn that contains less than 0.1% by mass of inorganic oxide fine particles and has enhanced light reflectivity. In addition, the semi-dull yarn and the full-dull yarn are textured yarns whose light impermeability is enhanced by blending 0.1 to 0.5% by mass and 1.5 to 5% by mass of oxidized inorganic fine particles, respectively. . These textured yarns are appropriately selected and used in combination based on the desired opacity, heat shielding properties, and the like.

The ratio of the multiple weave structure and the single weave structure that constitute the woven fabric of this embodiment is not particularly limited. As an example, the ratio of the multiple weave structure and the single weave structure is preferably 25:75 to 75:25, more preferably 50:50. When the ratio of the multiple weave structure and the single weave structure is within the above range, the obtained woven fabric can have both excellent air permeability and impermeability. Also, the woven fabric has an excellent appearance.

Next, the weave structure (mainly the arrangement of the multiple weave structure and the single weave structure) of the fabric of the present embodiment will be described with reference to a weave structure diagram. FIG. 1 is a woven fabric structure diagram P1 of the woven fabric of this embodiment. In FIG. 1, the black squares represent the portion where the warp threads are on the top (floating), and the white squares represent the portions where the warp threads are on the bottom. In the following description, the woven weave diagram shows the minimum repeating unit of the multiple woven weave and the single woven weave.

As shown in FIG. 1, the woven fabric has a multi-ply weave P1a (plain triple weave) and a single ply weave P1b (six mesh weave) arranged diagonally. ratio is 50:50. In FIG. 1, an imaginary line is added to the boundary of the multiple weave structure P1a or the single weave structure P1b for clarity of explanation (the same applies to FIGS. 2 to 19). A woven fabric having such a woven structure is particularly excellent in both air permeability and impermeability. Also, the fabric has an excellent appearance.

FIG. 2 is another woven fabric structure diagram P2 of the woven fabric of this embodiment. In the woven fabric shown in FIG. 2, a multiple weave design P2a (plain triple weave) and a single weave design P2b (six mesh weave) are arranged in parallel. :50. Such fabrics are particularly excellent in both breathability and impermeability. Also, the fabric has an excellent appearance.

FIG. 3 is another woven fabric structure diagram P3 of the woven fabric of this embodiment. The fabric shown in FIG. 3 employs an arrangement (surrounding arrangement) in which a multiple weave structure P3a (plain triple weave) is surrounded by a single weave structure P3b (six mesh weave). The ratio with tissue P3b is 25:75. Such fabrics are stronger and more breathable.

1 to 3 are examples of woven fabrics each composed of a multi-ply weave (plain three-ply weave) and a single-ply weave (6-mesh weave). A woven fabric consisting of a multi-ply weave (plain three-ply weave) and a single-ply weave (6 mesh weave) is not limited to the arrangement shown in the woven fabric diagrams of FIGS. 1 to 3. FIG. The fabric structure can be appropriately adjusted according to desired breathability, impermeability, appearance, and the like.

4 to 18 are other fabric weave diagrams (woven weave diagrams P4 to P18) of the fabric of this embodiment. The woven fabrics shown in FIGS. 4 to 6 are examples of woven fabrics composed of multiple weave structures P4a to P6a (plain triple weave) and single weave structures P4b to P6b (plain weave), and the fabric shown in FIG. 4 is arranged diagonally. , the fabric in FIG. 5 shows a parallel arrangement, and the fabric in FIG. 6 shows a surrounding arrangement. The woven fabrics shown in FIGS. 7 to 9 are examples of woven fabrics composed of multiple weave structures P7a to P9a (plain triple weave) and single weave structures P7b to P9b (2/1 twill weave). The fabric shown in FIG. 8 shows a diagonal arrangement, the fabric shown in FIG. 8 shows a parallel arrangement, and the fabric shown in FIG. 9 shows a surrounding arrangement. The woven fabrics shown in FIGS. 10 to 12 are examples of woven fabrics composed of multiple weave structures P10a to P12a (plain double weave) and single weave structures P10b to P12b (six mesh weave). The diagonal arrangement, the woven fabric of FIG. 11 shows the parallel arrangement, and the woven fabric of FIG. 12 shows the surrounding arrangement. The woven fabrics shown in FIGS. 13 to 15 are examples of woven fabrics composed of multiple weave structures P13a to P15a (plain double weave) and single weave structures P13b to P15b (plain weave). 14 shows a side-by-side arrangement, and the weave of FIG. 15 shows a surrounding arrangement. The woven fabrics shown in FIGS. 16 to 18 are examples of woven fabrics composed of multiple weave structures P16a to P18a (plain double weave) and single weave structures P16b to P18b (2/2 twill weave). indicates a diagonal arrangement, FIG. 17 shows a parallel arrangement, and FIG. 18 shows a surrounding arrangement.

The method of manufacturing the woven fabric is not particularly limited. To give an example, a woven fabric is first warped and placed on a loom. Similarly, the weft threads are placed on the loom. A loom is not particularly limited. Examples of looms include water jet looms, air jet looms, rapier looms, and the like. Among these, water jet looms and air jet looms are preferable as the loom because high-speed weaving is relatively easy and productivity can be easily improved.

As described above, according to the fabric of the present embodiment, by having both the multiple weave structure and the single weave structure, the high air permeability mainly derived from the multiple weave structure and the high air permeability mainly derived from the single weave structure It becomes possible to maintain physical properties. More specifically, the woven fabric of this embodiment has both a multiple weave structure and a single weave structure,
In the multiple weave structure part, the yarn density is distributed in multiple layers, and high air permeability mainly derived from the low density layer and retention of physical properties mainly derived from the single weave structure are possible.

More specifically, the woven fabric of the present embodiment has an air permeability measured by the Frazier method specified in JIS L 1096 8.27.1 A method (JIS 2004 version), It is 100 (cc/cm ² /sec) or more, preferably 120 (cc/cm ² /sec) or more. Since the woven fabric of the present embodiment has such a range of air permeability, when it is used as clothing, for example, excellent comfort can be obtained in hot and humid conditions in summer. Note that the upper limit of air permeability is not particularly limited. The upper limit of the air permeability is preferably 210 (cc/cm ² /sec) or less from the viewpoint of easily achieving an impermeability of 85% or more, which will be described later.

Further, the woven fabric of the present embodiment has an impermeability of 85% or more, preferably 90% or more, as represented by the following formula (1). Note that the upper limit of the degree of impermeability is not particularly limited. In addition, the degree of transparency is measured using a HunterLab spectrophotometer (model number: UltraScanPRO), and the lightness (L *) when using a white board as the background of the fabric and the lightness (L ^* ) when using a blackboard ^. It can be calculated by measuring.
Transparency (%) = 100 - [100 x (L ^* value when a whiteboard is installed on the back side of the sample - L ^* value when a blackboard is installed on the back side of the sample) / (L ^* value of whiteboard - blackboard L ^* value of)] ... (1)

Since the woven fabric of the present embodiment has these excellent performances, it can be suitably used in various applications where breathability and impermeability are required. Such applications include clothing (shirts, uniforms, blouses, sports clothing, etc.), curtains, fabrics for industrial materials (for tents, fiber parts that replace windows with breathability and impermeability, etc.), and , a sun hat, and the like.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is by no means limited to these examples.

The measurement method of each characteristic value is shown below.
(total fineness)
The total fineness was obtained by measuring the mass of a sample sampled under an initial load of 0.882 mN/dtex in accordance with JIS L 1013 (1999) 8.3.1 Regular fineness b) Method B when absolutely dried. , and the official moisture content specified in JIS L 0105 3.1 (the process moisture content was 4.5% for polyamide and 0% for polypropylene).

(single fiber fineness)
The single fiber fineness was calculated by dividing the total fineness by the number of filaments.

(number of filaments)
The number of filaments was calculated based on the method of JIS L 1013 (1999) 8.4.

(weight)
The basis weight was measured according to JIS L 1096-1999.

(Permeability)
The air permeability is determined by the Frazier method stipulated in JIS L 1096 8.27.1 A method (JIS 2004 version), using a Frazier air permeability tester (model number: AP-360SM, sold by Daiei Kagaku Seiki Seisakusho Co., Ltd.). ) was used to determine the amount of air (cc/cm ² /sec) passing through the test piece.

(impermeability)
For the degree of transparency, a spectrophotometer (model number: UltraScanPRO) manufactured by HunterLab was used to measure the lightness (L ^* ) when using a white board as the background of the fabric and the lightness (L ^* ) when using a blackboard. , was calculated based on the following formula (1).
Impermeability (%) = 100 - [100 x (L ^* value when a whiteboard is installed on the back side of the sample - L ^* value when a blackboard is installed on the back side of the sample) / (L ^* value of whiteboard - blackboard L ^* value of)] ... (1)

<Example 1>
The warp is made of polyester containing 2.0% by weight of titanium oxide as a matting agent, has an irregular cross-sectional shape, has a single yarn fiber fineness of 1.75 dtex, the number of filaments is 48, and the total fineness is A false-twisted yarn of 84 dtx was prepared (number of twists: 800 t/m). In addition, as wefts, false twisted yarns made of polyester, having an irregular cross-sectional shape, a single fiber fineness of 1.75 dtex, a filament count of 48, and a total fineness of 84 dtex were prepared (number of twists: 800t/m). Using these warps and wefts, the final warp density is 148 / inch and the final weft density is 109 / inch in an air jet loom. and were woven diagonally. The resulting woven fabric had a cover factor of 2355, an air permeability of 201 (cc/cm ² /sec), and an impermeability of 90.3%.

<Example 2>
As the warp, a false-twisted yarn was prepared which was made of polyester, had a rounded cross section, had a single fiber fineness of 3.48 dtx, had 48 filaments, and had a total fineness of 167 dtx (number of twists: 800t/m). In addition, as wefts, false twisted yarns made of polyester, having a polygonal cross-sectional shape, a single fiber fineness of 3.48 dtex, a filament count of 48, and a total fineness of 167 dtex were prepared (number of twists: 800t/m). Using these warps and wefts, the final warp density is 110/inch and the final weft density is 97/inch in an air jet loom. and were woven diagonally. The resulting woven fabric had a cover factor of 2675, an air permeability of 178 (cc/cm ² /sec), and an impermeability of 92.3%.

<Comparative Example 1>
As the warp, a false-twisted yarn was prepared which was made of polyester, had a rounded cross section, had a single fiber fineness of 3.48 dtx, had 48 filaments, and had a total fineness of 167 dtx (number of twists: 800t/m). In addition, as wefts, false twisted yarns made of polyester, having a polygonal cross-sectional shape, a single fiber fineness of 3.48 dtex, a filament count of 48, and a total fineness of 167 dtex were prepared (number of twists: 800t/m). Using these warps and wefts, an air jet loom was used to set the final warp density to 93/inch and the finished weft density to 85/inch. A woven fabric with a 75:25 weave was woven. 19 is a weave structure diagram of the woven fabric of Comparative Example 1. FIG. The fabric shown in FIG. 19 consists of a plain weave design P19a and a 4-mat weave design P19b. The resulting woven fabric had a cover factor of 2300, an air permeability of 91 (cc/cm ² /sec), and an impermeability of 84.3%.

<Examples 3 to 5>
The woven fabrics of Examples 3 to 5 were woven in the same manner as in Example 1, except that the type, arrangement, and physical properties of the woven structure shown in Table 1 below were changed.

The woven fabrics obtained in Examples 1 to 5 and Comparative Example 1 were evaluated for air permeability and impermeability by the evaluation methods described above. Table 1 shows the results.

As shown in Table 1, the fabrics of Examples 1 to 5 had an air permeability of 100 (cc/cm ² /sec) or more and an impermeability of 85% or more. It was confirmed that both air permeability and impermeability were achieved. On the other hand, Comparative Example 1 consisted of only a single weave structure, had a low air permeability, and an impermeability of 84.3%.

P1-P19 Woven weave structure P1a-P19a Multiple weave structure P1b-P19b Single weave structure

Claims (6)

having a multiple weave structure and a single weave structure,
Air permeability is 100 (cc/cm ² /sec) or more,
The anti-transparency shown by the following formula (1) is 85% or more ,
A woven fabric , wherein the ratio of the multiple weave structure and the single weave structure is 25:75 to 75:25.
Impermeability (%) = 100 - [100 x (L ^* value when a whiteboard is installed on the back side of the sample - L ^* value when a blackboard is installed on the back side of the sample) / (L ^* value of whiteboard - blackboard L ^* value of)] ... (1) The multiple weave structure is a plain triple weave,
2. The fabric of claim 1, wherein said single weave structure is a six mesh weave. The fabric according to claim 1 or 2, wherein at least one of the warp and the weft has a twist number of 300 to 2000 t/m. The fabric according to any one of claims 1 to 3, wherein at least one of warp and weft has a total fineness of 56 to 330 dtex. The textile according to any one of the preceding claims, wherein the cover factor is 1950-3100. The fabric according to any one of claims 1 to 5, wherein at least one of warp and weft is mixed with a matting agent.

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